| 摘要 |
Several methods for determining the near-surface layer velocity in the earth (can include the weathering layer velocity) from exploration seismic 2D or 3D data are presented. These velocity measurements are to be used in time-correcting seismic data during data processing in refraction statics, datum statics, elevation statics derivation and application or any other data processing scheme wherein the near-surface velocity is required. They can also be used as the near-surface part of the velocity model for depth-migration of seismic data. The velocity of the near-surface is directly related to the character of the shot records themselves. By statistically measuring this character from the shot records in an automated fashion, a large amount of data can be processed and the character measurement numerically converted to a velocity measuremen t using benchmark velocities at the extreme high and low values of the statistical dataset.</S DOAB>
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